#include <iostream>
#include <new>
using namespace std;

const int BUF = 512;
const int N = 5;

char buffer[BUF];

int main226()
{

    double *pd1, *pd2;
    int i;
    cout << "Calling new and placement new :\n";
    pd1 = new double[N];
    pd2 = new (buffer) double[N];

    for(i = 0; i<N; i++) {
        pd2[i] = pd1[i] = 1000 + 20.0 * i;
    }

    cout << "Memory addresses:\n" << " heap : "<<pd1
        << " static : " << (void *)buffer << endl;
    cout << "Memory contents:\n";
    for(i = 0; i<N; i++) {
        cout << pd1[i] << " at " << &pd1[i] << ", ";
        cout << pd2[i] << " at " << &pd2[i] << endl;
    }

    cout << "\nCalling new and placement new a second time:\n";
    double *pd3, *pd4;
    pd3 = new double[N];
    pd4 = new (buffer) double[N];
    for(i = 0; i<N; i++) {
        pd4[i] = pd3[i] = 1000 + 40.0 * i;
    }
    cout << "Memory contents:\n";
    for(i = 0; i<N; i++) {
        cout << pd3[i] << " at " <<&pd3[i] << "; ";
        cout << pd4[i] << " at " << &pd4[i] << endl;
    }

    cout << "\nCalling new and placement new a third time:\n";
    delete [] pd1;
    pd1 = new double[N];
    pd2 = new (buffer + N * sizeof(double)) double[N];
    for(i = 0; i<N; i++) {
        pd2[i] = pd1[i] = 1000 + 60.0 * i;
    }
    cout << "Memory content:\n";
    for(i = 0; i<N; i++) {
        cout << pd1[i] << " at "<< &pd1[i] << "; ";
        cout << pd2[i] << " at " << &pd2[i] << endl;
    }

    delete [] pd1;
    delete [] pd3;
    return 0;
}
